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   Re: [xml-dev] Datatypes - it's in the contract

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From: "Mike Champion" <mc@xegesis.org>

> Hmm.  That's a very interesting thought, and I would not at all disagree that lots of automated 
> testing is a Good Thing. But this doesn't persuade me that either a) a type-based "contract" will 
> meet many real business needs [which was probably not your intention] or b) that one can cut humans 
> out of the loop and simply use a type-based validation failure to "reject" a business document in any 
> business process sense.  It seems to me that having humans in the loop for quality assurance is just 
> as important as having humans in the loop for security assurance (see Bruce Schneier's oft-cited 
> opinions described in  http://www.theatlantic.com/issues/2002/09/mann.htm ).  

I can "imagine" a case where several institutions in a finance-related industry are using a common schema for applications, but each institution uses Schematron to vet applications based on their 
business rules.  Ultimately, the (encrypted) Schematron schemas could be
uploaded to the client-side so that a single application can be vetted by agents onsite.

Now, for this kind of use, the more type-aware Schematron can be, the better. 

Rick Jelliffe


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